I don't mean to sound brutal, but you've got a lot to learn before you can make a good map, my friend. Read all the tutorials here on the forum, and when you play TF2, think about why you like or dislike the stock maps. You're already better than I was when I started mapping about four years ago. After all that time, only now have I finally made a level I'm confident enough with to release. But don't get discouraged. Keep working, stay confident, you'll get there.

And don't say things like, I see a problem in my map, whatever. That attitude will get you nowhere. If you see a problem, fix it, and if you can't fix it, ask for help!